TheTelesteps Top Support has beendesigned to give you safe and flexible access no matter where you place your ladder. You can use it on flat surfaces, inner or outer corners, even on round objects like a post or a tree.The bar is equipped with rubber tops to prevent marks when placing the ladder on a surface, for example indoor walls.It is easy to use, just push the two spring loaded buttons to release the locking from its fixed position, then move the bar to the open or folded position.Supplied with two sets of adaptors to fit all Prime ladders and is easily mounted on the side profiles under the top rung of your ladder.